Visibility of computers on remote LAN

When I connect to the remote LAN using OpenVPN I can access remote computers by IP or by name without any problems. It's possible that, going on my computer to Start > Net, I can see all the computers of the remote LAN?

Look more closely at the OpenVPN config. There is a provision to enable netbios over openvpn. This is easier to do in TAP mode as your OpenVPN clients will already be on the correct network to connect to netbios resources on the OpenVPN server's local network. If you are using TUN mode, you must allow the TUN network access to the netbios resources you want to connect to.